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Water mimosa (Neptunia oleracea Lour.) can fix and transfer nitrogen to rice in their intercropping system

文献类型： 外文期刊

作者： Hei, Zewen 1 ; Xiang, Huimin 1 ; Zhang, Jiaen 1 ; Liang, Kaiming 5 ; Ren, Xiaoqiao 1 ; Sun, Yanran 2 ; Wu, Ruiqin 2 ;

作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Ecocircular Agr, Guangzhou 510642, Peoples R China

2.South China Agr Univ, Dept Ecol, Coll Nat Resources & Environm, Guangzhou, Peoples R China

3.Guangdong Prov Engn Technol Res Ctr Modern Ecoagr, Guangzhou, Peoples R China

4.South China Agr Univ, Key Lab Agroenvironm Trop, Minist Agr & Rural Affairs, Guangzhou, Peoples R China

5.Guangdong Acad Agr Sci, Guangdong Key Lab New Technol Rice Breeding, Rice Res Inst, Guangzhou, Peoples R China

关键词： intercropping; rice; water mimosa; N-15 dilution; biological N fixation; N transfer

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.639； 五年影响因子：3.803 ）

ISSN： 0022-5142

年卷期： 2022 年 102 卷 1 期

页码：

收录情况： SCI

摘要： BACKGROUND Cereal-legume intercropping systems are an environmentally friendly practice in sustainable agriculture. However, research on the interspecific interaction of nitrogen (N) between rice and aquatic legumes has rarely been undertaken. To address this issue, a pot experiment was conducted to investigate N utilization and the N interaction between rice and water mimosa (Neptunia oleracea Lour.) in an intercropping system. The root barrier patterns consisted of solid barrier (SB), mesh barrier (MB), and no barrier (NB) treatments. The N fertilizer application rates were low, medium, and high N rates. RESULTS The results showed that the NB treatment better facilitated rice growth compared with the MB and SB treatments. And the nitrate N content and urease activity of rice rhizospheric soil in the NB treatment were the highest of the three separated patterns. The ammonium N content in water mimosa rhizospheric soil and N-2 fixation of water mimosa ranked as NB > MB > SB. CONCLUSIONS The amount of N fixation by water mimosa was 4.38-13.64 mg/pot, and the N transfer from water mimosa to rice was 3.97-9.54 mg/pot. This can promote the growth of rice and reduce the application of N fertilizer. We suggest that the rice-water mimosa intercropping system is a sustainable ecological farming approach and can be applied in the field to facilitate rice production. (c) 2021 Society of Chemical Industry.

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